Discussion
We have some cranes that have been used for the building next door to us , three of them.
Looking out of the window today there now seems to be one.
This building is 15 Story's high.
Anyone know who they dismantle them when they go through the building . And how they get the last one down?
Looking out of the window today there now seems to be one.
This building is 15 Story's high.
Anyone know who they dismantle them when they go through the building . And how they get the last one down?
I always wondered this.
Some good explanations here : http://uk.answers.yahoo.com/question/index?qid=200...
Some good explanations here : http://uk.answers.yahoo.com/question/index?qid=200...
Mike400 said:
Its all a big lie - what they actually do is box the crane in and plaster / paint it up.
Have you ever been on the roof of your building? go up there and youll find the boom of the crane that built yours!
Waits to be corrected but i think that in the bigger buildings they often tend to use most of the crane to form the lift shaft.Have you ever been on the roof of your building? go up there and youll find the boom of the crane that built yours!
- disclaimer - I might have made this up
i am happy to be corrected though.
@ Mike 400Weve got a 17/18 storey building in Town with a large fixed crane. When they put it up they shut the road off for a weekend and brought in the biggest 'Fox trot oscar' mobile crane you'd ever seen to put it up. It had extra jibs to reach the required height brought in by other lorries.
Whoops!! maybe this should have gone on the other thread.
An example of the size of a huge mobile crane.
http://uk.youtube.com/watch?v=HI-ENqgjQXM
Here's how they dismantle up to a certain height.
http://uk.youtube.com/watch?v=_j8t4H5eNUI&feat...
For the real high ones they are self dismantling. At a guess the crane has a way of turning around on it's counterweight construction to lower it down part by part. The main boom would then be raised vertical so it fits down the centre of the building. At the bottom of the building they take out a section at a time, lowering the crane as they go. Again I'm only guessing, otherwise just push it over the side and hope for the best, as already mentioned
http://uk.youtube.com/watch?v=_j8t4H5eNUI&feat...
For the real high ones they are self dismantling. At a guess the crane has a way of turning around on it's counterweight construction to lower it down part by part. The main boom would then be raised vertical so it fits down the centre of the building. At the bottom of the building they take out a section at a time, lowering the crane as they go. Again I'm only guessing, otherwise just push it over the side and hope for the best, as already mentioned
The cranes use a climbing frame that fits around the mast, depending upon if you are going up or down the crane slew ring (the bit under hammerhead) is connected to the top of the frame, this then jacks it up the hight of one mast section. They then lift another section in and repeat. Going down is the reverse process.
This is how not to do it.
http://www.sitbonzo.com/crane/
With respect to the one in the post above we have been discussing this for a while, there doesn't appear to be another crane close to the one on the roof and the mast doesn't go down to the floor.
I bet they take it down with a helicopter.
This is how not to do it.
http://www.sitbonzo.com/crane/
With respect to the one in the post above we have been discussing this for a while, there doesn't appear to be another crane close to the one on the roof and the mast doesn't go down to the floor.
I bet they take it down with a helicopter.
ZR1cliff said:
The main boom would then be raised vertical so it fits down the centre of the building. At the bottom of the building they take out a section at a time, lowering the crane as they go.
I'm not sure they could do that. There will be lift shafts but I doubt they'd be big enough and would have gubbins in it by that time. The don't think the Burj lifts even go all the way to the top.The only way I can see is dismantle it, and then send it down piece by piece perhaps with changeover points on the way down (otherwise they'd need a helluva big cable).
Edited by Neil_H on Monday 1st December 14:35
Neil_H said:
ZR1cliff said:
The main boom would then be raised vertical so it fits down the centre of the building. At the bottom of the building they take out a section at a time, lowering the crane as they go.
I'm not sure they could do that. There will be lift shafts but I doubt they'd be big enough and would have gubbins in it by that time. The don't think the Burj lifts even go all the way to the top.The only way I can see is dismantle it, and then send it down piece by piece perhaps with changeover points on the way down (otherwise they'd need a helluva big cable).
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